The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory. Take special note that while the original Bernstein software works with barycentric coordinates, we convert these results into a heliocentric coordinate system.
# Object: 118379
# Created Sun Dec 22 02:06:52 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 15 observations of 15
# Arc: 5.99y
# First observation: 1999/04/18
# Last observation: 2005/04/14
# Chi-squared of fit: 40.75 DOF: 24 RMS: 0.29
# Min/Max residuals: -0.45 0.68
# Exact a, adot, b, bdot, g, gdot:
1.910011E-05 2.657910E-02 -6.686843E-06 -6.964963E-03 2.618708E-02 5.532988E-03
# Covariance matrix:
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
# lat0 lon0 xBary yBary zBary JD0
4.838215 -140.159905 0.212805 0.083158 -0.985440 2451286.843043
# Heliocentric elements and errors
Epoch: 2451286.5000 = 1999/04/18
Mean Anomaly: 44.82342 +/- 0.000
Argument of Peri: 94.38595 +/- 0.000
Long of Asc Node: 56.99011 +/- 0.000
Inclination: 15.38012 +/- 0.000
Eccentricity: 0.23060246 +/- 0.0000
Semi-Major Axis: 45.00823920 +/- 0.0000
Time of Perihelion: 2437554.3357 +/- 0.0
Perihelion: 34.62922874 +/- 0.0000
Aphelion: 55.38724967 +/- 0.0000
Period (y) 301.9578 +/- 0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -30.10375907 +/- 0.0000
Ecliptic Y -24.84715464 +/- 0.0000
Ecliptic Z 3.22054368 +/- 0.0000
Ecliptic XDOT 0.00128805 +/- 0.0000
Ecliptic YDOT -0.00253355 +/- 0.0000
Ecliptic ZDOT -0.00067678 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 39.16605208 +/- 0.0000
Geocenter to KBO 38.18667888 +/- 0.0000
# Hcoef: 7.58
The following table shows the complete astrometric record for 118379. The first three columns show the date of observation. The next six columns are RA and DEC. The next column (when provided) is the observed magnitude and filter. The next column is the object name (118379) followed by the observatory code and reference code for the source of the astrometry.
1999 04 18.34230 14 35 56.44 -10 10 06.7 22.4R 118379 695 Ca4930 1999 04 18.42194 14 35 56.08 -10 10 06.0 118379 695 Ca4930 1999 04 18.45872 14 35 55.93 -10 10 05.3 118379 695 Ca4930 1999 05 05.92279 14 34 28.36 -10 04 04.2 118379 950 Ca4930 1999 05 05.98393 14 34 28.04 -10 04 02.6 118379 950 Ca4930 1999 05 06.04595 14 34 27.72 -10 04 01.4 118379 950 Ca4930 2000 05 25.38542 14 38 10.95 -10 48 56.1 118379 568 Cb5145 2000 05 25.48959 14 38 10.46 -10 48 54.6 118379 568 Cb5145 2000 05 26.52670 14 38 05.76 -10 48 39.1 118379 568 Cb5145 2000 06 29.96015 14 36 03.96 -10 43 58.7 118379 950 Cd4116 2000 06 29.98364 14 36 03.88 -10 43 58.7 118379 950 Cd4116 2001 03 24.43076 14 48 21.13 -11 57 57.2 23.5R 118379 695 Cc7487 2001 03 24.50509 14 48 20.86 -11 57 56.0 118379 695 Cc7487 2005 04 14.33514 15 07 57.45 -15 00 56.6 23.8R 118379 304 Cn3201 2005 04 14.35911 15 07 57.34 -15 00 56.4 118379 304 Cn3201
The following table shows the residuals to the orbit fit. The first coumn is the point number. The second column is the time, in years, measured from the first observation. The third and fifth columns are the regularized positions used in the orbit fit. The fourth and sixth columns are the residuals, in arc seconds, for RA and Dec respectively.
1 0.0000 0.00 -0.45 0.00 0.68
2 0.0002 0.00 0.10 0.00 -0.32
3 0.0003 0.00 0.59 0.00 -0.40
4 0.0481 0.00 -0.09 0.00 -0.34
5 0.0483 0.00 -0.20 0.00 0.06
6 0.0485 0.00 -0.23 0.00 0.05
7 1.1035 0.00 0.16 0.00 -0.00
8 1.1038 0.00 0.09 0.00 -0.06
9 1.1066 0.00 0.54 0.00 0.23
10 1.2009 0.00 -0.04 0.00 -0.22
11 1.2009 0.00 -0.41 0.00 -0.25
12 1.9332 0.00 0.04 0.00 0.37
13 1.9334 0.00 0.09 0.00 0.33
14 5.9904 0.00 -0.04 0.00 0.01
15 5.9905 0.00 -0.05 0.00 -0.18
The following table comes from a 10My integration of the orbit of the object. Three columns are shown. The first column is the result of integrating the nominal orbit. The other two columns are based on clones of the nominal orbit that are +/- 3 sigma from the nominal orbit. If all three types agree then the classificiation is deemed secure. The basis for these calculations is described in more detail in AJ, 129, 1117 (2005). Any use made of these calculations should refer to and credit this publication and the Deep Ecliptic Survey Team.
118379 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 45.001 45.001 45.001 ecceobj 0.231 0.231 0.231 incobj 15.387 15.387 15.387 qmin 33.822 33.666 33.570 qmax 57.282 57.905 57.962 amean 45.355 45.496 45.506 amin 44.889 44.992 44.974 amax 45.872 46.120 46.148 emean 0.231 0.236 0.236 emin 0.211 0.211 0.210 emax 0.252 0.258 0.261 imean 14.442 14.501 14.429 imin 13.271 13.250 13.236 imax 15.447 15.658 15.595 excite_mean 0.340 0.345 0.344 fracstop 1.000 1.000 1.000 cjmean 2.977 2.974 2.975 libcent 0 -180.0 -180.0 -180.0 libamp 0 -180.0 -180.0 -180.0 libcent 1 -180.0 -180.0 -180.0 libamp 1 -180.0 -180.0 -180.0 libcent 2 -180.0 -180.0 -180.0 libamp 2 -180.0 -180.0 -180.0 libcent 3 -180.0 -180.0 -180.0 libamp 3 -180.0 -180.0 -180.0 libcent 4 -180.0 -180.0 -180.0 libamp 4 -180.0 -180.0 -180.0 kozaimean 179.9 179.0 184.9 kozaiamp 179.9 180.0 180.0